Here's a little guide to get the Appr of any mob you want..
Step 1:
First of all Find Wil number its in, eg Mon17.wil. Now -1 from that Wil number
making it 16.
Step2:
Each Mon file can contain 10 mobs only, so it ranges from 0-9 (Not 1-10).
Now for the very first mob in Mon17 it will be 160, for the 2nd mob it will
be 161 and so on.
So another quick example: the Appr of the 5th mob in Mon11 will be 104 (10-4).